DO NOT LAND: Test no paint invalidation for LayoutText.

third_party/WebKit/Source/core/layout/LayoutText.h

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 63 matching lines @@
   LayoutText(Node*, PassRefPtr<StringImpl>);
 #if DCHECK_IS_ON()
   ~LayoutText() override;
 #endif
 
   const char* name() const override { return "LayoutText"; }
 
   virtual bool isTextFragment() const;
   virtual bool isWordBreak() const;
 
+  LayoutRect visualRect() const override { return parent()->visualRect(); }
+
   virtual PassRefPtr<StringImpl> originalText() const;
 
   void extractTextBox(InlineTextBox*);
   void attachTextBox(InlineTextBox*);
   void removeTextBox(InlineTextBox*);
 
   const String& text() const { return m_text; }
   virtual unsigned textStartOffset() const { return 0; }
   String plainText() const;
 
@@ skipping 259 matching lines @@
 
 inline LayoutText* Text::layoutObject() const {
   return toLayoutText(CharacterData::layoutObject());
 }
 
 void applyTextTransform(const ComputedStyle*, String&, UChar);
 
 }  // namespace blink
 
 #endif  // LayoutText_h